Left Atrial Volume Index
Left atrial volume normalized to body surface area. Normal LAVI is 34 mL/m² or less in adults (ASE / EACVI 2016). A key HFpEF diagnostic criterion.
LAVI is calculated by indexing the maximum left atrial volume (measured at end-systole) to body surface area, expressed in mL/m². Normal LAVI in adults is ≤34 mL/m² (ASE / EACVI 2016 diastolic-function recommendations).
A persistently elevated LAVI reflects long-standing elevation of LV filling pressures and is one of the four structural / functional pillars of HFpEF diagnosis (alongside elevated E/e', elevated PASP, and LV hypertrophy).
Manual LA volume tracing is operator-dependent; AI-derived LAVI from a complete TTE is more reproducible and supports consistent serial follow-up.
LAVI Calculator
Educational estimate using the Mosteller BSA formula. Not a diagnosis; clinical interpretation requires a qualified clinician. Reference range: ASE / EACVI 2016 diastolic-function recommendations.